Re: [PR] [FLINK-38783][runtime] Improved TieredStorageResourceRegistry Thread-Safety/Concurrency [flink]

["abjfh30 (via GitHub)" <gi...@apache.org>]

abjfh30 commented on code in PR #27459:
URL: https://github.com/apache/flink/pull/27459#discussion_r3577349592


##########
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/hybrid/tiered/storage/TieredStorageResourceRegistry.java:
##########
@@ -20,19 +20,19 @@
 
 import org.apache.flink.runtime.io.network.partition.hybrid.tiered.common.TieredStorageDataIdentifier;
 
-import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 /**
  * A registry that maintains local or remote resources that correspond to a certain set of data in
  * the Tiered Storage.
  */
 public class TieredStorageResourceRegistry {
 
-    private final Map<TieredStorageDataIdentifier, List<TieredStorageResource>>
-            registeredResources = new HashMap<>();
+    private final ConcurrentHashMap<
+                    TieredStorageDataIdentifier, CopyOnWriteArrayList<TieredStorageResource>>

Review Comment:
   LGMT



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